The blue ocean is an emerging market full of profitable and attractive opportunities, untainted by cutthroat competition, and a business strategy that avoids cutthroat competition and seeks to innovate.
1. Problems with the Controller
1.1 The projection lamp cannot be lit
A: Check if the button for the projection lamp is on.
1.2 Unable to boot
A: Check if the power supply has electricity.
1.3 Abnormal temperature rise
A: Check if the temperatur